If you're traveling into the USA... understand that the border (incl airports) is a gray area. A lot of our rights do not attach to you until your passport is stamped. Customs and Border Authorities can take your phone right out of your hands (and they will) and search it, they search bags, etc...π§΅
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If you can't avoid travel to the U.S., bring only burner phones & stripped computers to minimize chances of security finding anything they label as anti-Trump.
It seems insane (it IS insane), but better to be safe than to risk illegal accusations, maltreatment, & unjust consequences.
https://www.dhs.gov/dhs-trip
You can certainly wipe all mobile browser history and delete many apps including on-device data.
https://www.eff.org/wp/digital-privacy-us-border-2017
10 years ago I would have said someone was crazy to do this.
And now I wonβt consider crossing the border so I personally donβt need these tips that do seem to be good.
Insanity.
Moscow rules LOL
Might want to log out of apps, too, so they canβt access them just by opening your phone.
If someone wants into the country (maybe they have family here, or sent on business), it's best they follow my advice. It's even offered free.
Recognizing that your own mileage may vary, the EFF report below is dated but offers solid food for thought.
https://www.eff.org/wp/digital-privacy-us-border-2017